Pipe wrenches should be inspected regularly. Replace the heel and jaw section if found to be defective or worn out.

应当定期检查管钳，更换已磨损或有伤痕的钳牙及牙床。

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Pipe wrenches should be inspected regularly. Replace the heel and jaw section if found to be defective or worn out.

应当定期检查管钳，更换已磨损或有伤痕的钳牙及牙床。

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